Installing Python 2.7.0 (32-bit) for OpenCV 2.4.0 under Windows 7 (64-bit)
After getting errors like this:
http://stackoverflow.com/questions/5030362/how-to-use-opencv-in-python
I discovered that OpenCV works best (most easily) under Windows as 32-bit
http://luugiathuy.com/2011/02/setup-opencv-for-python/
The alternative is to compile OpenCV for 64-bit
http://stackoverflow.com/questions/3919681/compiling-opencv-on-windows-7-64bit
I discovered that my Windows install of Python (2.7.3) was conflicting with my (implicit) Cygwin install
(2.6.5), so I removed the Python language package from Cygwin.

